Assumptions: You really really want to get to Tundra Stalker.
Let's start with a bare bones frost build:
Note the frost tree is very tight, almost to the point of self-explanatory. You may question Deathchill, Chill of the Grave, Glacier Rot, Rime, Merciless Combat - but I've used these to get to Tundra Stalker. Other options to get to Tundra Stalker are acclimation, hungering cold, or the improved icy talons. I left HB out for the sake of dicussion.
We conveniently have 6 points left - our options are as follows:
Improved Icy Talons (6 points)
Two-handed Weapon Spec (2 points)
Scent of Blood (3 points)
Howling Blast (1 point)
Epidemic (2 points)
Morbidity (3 points)
This is a very, very, very high cost.
From a 10 man perspective - If you don't have an enhancement shaman I recommend asking one of your DK's to go DW Frost (the DPS is very competitive). If your dps DK is blood it is easier for the DK tank to go blood and provide abom's might then it is for the DK tank to be frost and provide Improved Icy Talons.